.inset-shadow {
    box-shadow: inset 0 7px 9px -7px rgba(0, 0, 0, .7);
}

.shadow-1 {
    box-shadow: 0 1px 3px rgba(0, 0, 0, .2), 0 1px 1px rgba(0, 0, 0, .14), 0 2px 1px -1px rgba(0, 0, 0, .12);
}

.shadow-2 {
    box-shadow: 0 1px 5px rgba(0, 0, 0, .2), 0 2px 2px rgba(0, 0, 0, .14), 0 3px 1px -2px rgba(0, 0, 0, .12);
}

.shadow-3 {
    box-shadow: 0 1px 8px rgba(0, 0, 0, .2), 0 3px 4px rgba(0, 0, 0, .14), 0 3px 3px -2px rgba(0, 0, 0, .12);
}

.no-shadow {
    box-shadow: none;
}